EDDY CURRENT TESTING

Eddy-current testing (also commonly seen as eddy current testing and ECT) is one of many electromagnetic testing methods used in nondestructive testing (NDT) making use of electromagnetic induction to detect and characterize surface and sub-surface flaws in conductive materials.

Applications

ECT finds applications in both tubing and surface applications

Detection capabilities to defect type in tubing

Several types of defects can be detected in tubing with varying degrees of success:

Inner-diameter (ID) pitting: excellent

Outer-diameter (OD) pitting: excellent

Axial cracking: acceptable, but limited

Circumferential cracking: acceptable, but limited

ID corrosion: excellent

OD corrosion: excellent

Defects at tubesheet: acceptable, but limited

Sizing capabilities to defect type in tubing

Several types of defects can be sized in tubing with varying degrees of success:

Inner-diameter (ID) pitting: good

Outer-diameter (OD) pitting: excellent

Axial cracking: good

Circumferential cracking: unsuitable

ID corrosion: good

OD corrosion: excellent

Defects at tubesheet: good

Suitability according to material

ECT is limited to being used on non-ferromagnetic materials.

ECT on surfaces

When it comes to surface applications, the performance of any given inspection technique depends greatly on the specific conditions — mostly the types of materials and defects, but also surface conditions, etc. However, in most situations, the following are true:

Effective on coatings/paint: yes

Computerized record keeping: partial

3D/Advanced imaging: none

User dependence: high

Speed: low

Post-inspection analysis: none

Requires chemicals/consumables: no

Contact

Cell : 093810 48884, 09384577677
Email : twggroupchennai@gmail.com

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